1. J.K. Kennedy, W.D. Potter, and D.E. Davies, J. Cryst. Growth24/25, 233 (1974).
2. J.K. Kennedy and W.D. Potter, J. Cryst. Growth19, 85 (1973).
3. J. Abrokwah, T. Peck, R. Walterson, G.E. Stillman, and T.S. Low, to be published in J. Electron. Mater.
4. L.M. Zinkiewicz, T.J. Roth, B.J. Skromme, and G.E. Stillman, inGallium Arsenide and Related Compounds, Vienna, 1980 (Institute of Physics, Bristol 1981) p. 19.
5. T.J. Roth, B.J. Skromme, T.S. Low, G.E. Stillman, and L.M. Zinkiewicz,Semiconductor Growth Technology, Proc. Soc. Photo-Opt. Instr. Eng.323 (1982) p. 36.